TWIN 32 x 38 mm - steam engine for small boats or canoes

A special section just for steam engines and boilers, as without these you may as well fit a sail.
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RNoe
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by RNoe » Sun Mar 06, 2022 4:41 pm

Dietrich:
Very interesting ideas!
The next phase would have the stroke-adjusting disc position controlled by the boiler water level control, to automatically maintain water level...
And yes, I know there are other ways to do that, going back a century and more in time.
'Just for the mental exercise...
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Thu Mar 24, 2022 12:21 am

Russ,
... The next phase would have the stroke-adjusting disc position controlled by the boiler water level control, to automatically maintain water level...
Probably not, the mechanics should remain simple. ;) ;) ;)

There was some little success. The piston rod gland nuts were finished so it is possible to use the spanner to tighten it with the above shown spanner.

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I will built the the eccentric rods from several parts.

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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Thu Mar 24, 2022 12:26 am

The outer eccentric bodies were silver soldered.

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Now i will mill and saw them as designed.

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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by DetroiTug » Fri Mar 25, 2022 3:06 am

Good solution to save material.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by fredrosse » Fri Mar 25, 2022 6:02 am

Additive fabrication, saves material and machining difficulties.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by barts » Fri Mar 25, 2022 2:55 pm

On additive fabrication: Those who are not familiar with Kozo Hiraoka's excellent series in Live Steam back in the 70s and 80s would do well to examine one of his books or magazine artiles. Although somewhat smaller in scale than stuff many of us are used to, his fabrication techniques which rely extensively on fixturing and silver soldering parts together and then finish machining are well worth examining.

https://www.amazon.com/s?i=stripbooks&r ... _sr_book_1

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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by RNoe » Fri Mar 25, 2022 4:09 pm

I couldn't agree more about Kozo's books.
I have them all, have studied his multitude of techniques and built two steam locomotives so far.
And silver brazing remains one of my favorite fabrication techniques.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Sun May 01, 2022 1:48 pm

Hi,

kozos books are one of the best i know.

The eccentric rods are ready. It is a composite construction. The head is soldered to the middle part and that is fixed with three M3-screws to the outer eccentric bodies.

I have built a soldering fixture so all four rods will have the equal length.

Twin3238_366kl.jpg
The soldering fixture
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The soldered heads
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The eccentric rods
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Sun May 01, 2022 1:57 pm

Hi,

then the forks were rounded so they will look nice and go free from other parts. I had built a milling fixture and panned the parts by hand.

Twin3238_391kl.jpg
The milling fixture
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Then the borings were reamed and the M5 x 0,5 mm threads cutted.

Twin3238_394kl.jpg
The finished eccentric rods
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Twin3238_396kl.jpg
The finished valve rods
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by TahoeSteam » Mon May 02, 2022 5:15 am

Dietrich,

Your work looks very good. I have to remind myself the scale that you're building at and how steady and patient you must be.

Love seeing your updates.

Cannot wait to see more
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